Frameless portable suspension system

ABSTRACT

A frameless portable suspension system includes a tensional two-dimensional material having a frameless perimeter, opposite upper corners, and a bottom secured to ground, the tensional two-dimensional material located in a vertical plane perpendicular to the ground; a pair of adjustable spring mechanisms coupled to the upper corners and providing the upper corners in tension in an upward vertical direction and a outward horizontal direction, and wherein the tension in the tensional two-dimensional material is adjustable with the adjustable spring mechanisms while the tensional two-dimensional material is under tension and the tensional two-dimensional material is positionable in a vertical plane perpendicular to the ground upon adjustment of the tension in the tensional two-dimensional material with the adjustable spring mechanism.

FIELD OF THE INVENTION

The present invention is in the field of portable sport rebounders andportable sign suspension assemblies.

BACKGROUND OF THE INVENTION

Sports nets and rebounders have been devised in the past to catch sportsballs and/or to rebound sports balls delivered (e.g., thrown, kicked,hit, etc.) at the net/rebounder by a user. These sports nets/reboundershave suffered from a number of drawbacks, one or more of whichinclude: 1) the rebounder does not adequately rebound the sports ball tothe user, 2) the sports net/rebounder is difficult and/or time consumingto assembly, 3) the sports net/rebounder is not portable, 4) the sportsnet/rebounder includes a perimeter frame made of numerous and/or lengthypoles or other supports.

SUMMARY OF THE INVENTION

The frameless portable suspension system of the present inventionrepresents an improvement over sports nets and rebounders of the past,and may be used in other applications, such as, but not limited to,portable sign suspension.

An aspect of the present invention involves a frameless portablesuspension system. The frameless portable suspension system includes atensional two-dimensional material having a frameless perimeter,opposite upper corners, and a bottom secured to ground, the tensionaltwo-dimensional material located in a vertical plane perpendicular tothe ground; a pair of adjustable spring mechanisms coupled to the uppercorners and providing the upper corners in tension in an upward verticaldirection and a outward horizontal direction, and wherein the tension inthe tensional two-dimensional material is adjustable with the adjustablespring mechanisms while the tensional two-dimensional material is undertension and the tensional two-dimensional material is positionable in avertical plane perpendicular to the ground upon adjustment of thetension in the tensional two-dimensional material with the adjustablespring mechanism.

Another aspect of the present invention involves a frameless portablesuspension system. The frameless portable suspension system includes atensional two-dimensional material having a frameless perimeter,opposite upper corners, and a bottom secured to ground, the tensionaltwo-dimensional material located in a vertical plane perpendicular tothe ground; a pair of adjustable length resilient poles coupled to theupper corners of the tensional two-dimensional material and including alongitudinal center; a pair of tension connectors including endsconnected to the pair of adjustable length resilient poles below thelongitudinal center to provide flex in the pair of adjustable lengthresilient poles and opposite ends secured to the ground.

A further aspect of the present invention involves a frameless portablesuspension system. The frameless portable suspension system includes atensional two-dimensional material having a frameless perimeter,opposite upper corners, and a bottom secured to ground, the tensionaltwo-dimensional material located in a vertical plane perpendicular tothe ground; a pair of adjustable length resilient poles including upperends coupled to the upper corners of the tensional two-dimensionalmaterial and lower ends freely pivotal relative to the ground, andwherein the pair of adjustable length resilient poles provide the uppercorners in tension in an upward vertical direction and a outwardhorizontal direction.

Further objects and advantages will be apparent to those skilled in theart after a review of the drawings and the detailed description of thepreferred embodiments set forth below.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a rear perspective view of an embodiment of a framelessportable suspension system.

FIG. 2 is a rear elevational view of the frameless portable suspensionsystem illustrated in FIG. 1.

FIG. 3 is a front elevational view of the frameless portable suspensionsystem illustrated in FIG. 1.

FIG. 4 is a left side elevational view of the frameless portablesuspension system illustrated in FIG. 1.

FIG. 5 is a rear perspective view of an embodiment of a ground anchor ofthe frameless portable suspension system taken from area 5 in FIG. 1 andshows the ground anchor connected to a bottom corner of a net of theframeless portable suspension system.

FIG. 6 is a rear perspective view of an embodiment of a top end of atelescoping pole assembly of the frameless portable suspension systemtaken from area 6 in FIG. 1 and shows the top end of a telescoping poleassembly connected to a top corner of the net of the frameless portablesuspension system.

FIG. 7 is a rear perspective view of an embodiment of a telescopingconnection of the telescoping pole assembly of the frameless portablesuspension system taken from area 7 in FIG. 1.

FIG. 8 is a rear perspective view of an embodiment of a bottom end ofthe telescoping pole assembly, a ground anchor, and a high-strengthstrap of the frameless portable suspension system taken from area 8 inFIG. 1.

FIG. 9 is a top plan view of the frameless portable suspension systemillustrated in FIG. 1.

FIG. 10 is a rear perspective view of an embodiment of a connectionsection of the telescoping pole assembly and a top end of an adjustablelength strap of the frameless portable suspension system taken from area10 in FIG. 1.

FIG. 11 is a rear perspective view of an embodiment of a ground anchorand a bottom end of the adjustable length strap of the framelessportable suspension system taken from area 11 in FIG. 1.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

With reference to FIGS. 1–11, and initially FIG. 1, a frameless portablesuspension system 20 constructed in accordance with an embodiment of theinvention will now be described. Although the frameless portablesuspension system 20 will be described in a soccer ball reboundingapplication, the frameless portable suspension system 20 may be used forother sports ball rebounding applications. Further, the framelessportable suspension system 20 may be used for non-reboundingapplications such as, but not limited to, portable sign suspension foradvertising signs (e.g., advertising new housing/rental developments,advertising political causes/candidates, or other advertising purposes).

The frameless portable suspension system 20 generally includes atensionable two-dimensional material or net 30, a pair of telescopingpole assemblies 40, a pair of adjustable length straps 50, a pair ofhigh strength straps 60, and multiple ground anchors 70. Each of thesecomponents will be described in turn below.

In the embodiment shown, the tensionable two-dimensional material 30 isa sport net that is tensionable in both vertical and horizontaldirections to be taught yet flexible enough to withstand and repel largeimpact forces such as those produced by various sports balls travelingat high velocity that contact the net 30 or high velocity wind. In theembodiment shown, the net 30 is rectangular and includes the samedimensions as the goal opening in a regulation soccer goal (8 ft. inheight×24 ft. in length). As used herein, “two-dimensional material”refers to materials such as flexible signs, nets stretchable into a flatconfiguration, and the like that when placed in tension have aconfiguration that is substantially in two main dimensions (i.e.,substantial length and substantial width compared to thickness). The net30 includes an upper right corner 80, an upper left corner 90, a bottomright corner 100, and a bottom left corner 110. As used herein,“frameless” means the two-dimensional material 30 does not have a framealong a substantial portion of the perimeter. In the frameless portablesuspension system 20, the vertical and horizontal tension placed on thenet 30 at the upper corners 80, 90 by the telescoping pole assemblies 40maintains the net 30 in the configuration shown in FIGS. 1–3. Althoughthe tensionable two-dimensional material 30 is shown and described as asoccer sports net, in alternative embodiments, the tensionabletwo-dimensional material 30 may be other tensionable materials such as,but not limited to, a flat fabric panel such as that used for anadvertising sign.

With reference to FIGS. 1 and 7, the telescoping pole assembly 40 is atwo-piece adjustable-length fiberglass pole and includes an 82 in., 1.00in. outer diameter upper pole member 120 slidably received in a 82 in.,1.25 in. outer diameter lower pole member 130 for convenientlyincreasing and decreasing the length of the pole assembly 40. When thepole assembly 40 is set to the desired length (i.e., when the upper polemember 120 is moved to the desired position in lower pole member 130),the length of the pole assembly 40 is fixed using a plastic compressionfitting including a threaded collar 140 and an externally threadedconnector 150. The length of the pole assembly 40 is locked by rotatingand tightening internally threaded collar 140 onto externally threadedconnector 150.

With reference to FIG. 6, the pole assembly 40 includes an upper end 160with a cap 170 fixed thereto. The cap 170 carries a circular connector180 that couples the upper end 160 to the upper corners 80, 90 through acarabiner 190. Although the connection of the upper end 160 of the poleassembly 40 is shown as including a cap 170, a circular connector 180,and a carabiner 190, in alternative embodiments, the connection mayinclude one or more of these connector elements or one or more differentconnector elements.

With reference to FIG. 8, the pole assembly 40 includes a lower end 200with a cap 210 fixed thereto. Spaced above the cap 210 is a stop 220(with circular lip) circumferentially and longitudinally fixed to thecircumference of the lower pole member 130. The high strength strap orconnector 60 is made of 1 in. nylon webbing rated at 600 lb. breakingstrength and is connected at one end portion to the lower pole member130 between the stop 220 and the cap 210 and connected at an oppositeend portion to a head 230 of ground anchor 70. The stop 220 prevents thestrap 60 from sliding past the stop 220 on the pole assembly 40. In theembodiment shown, the ground anchor 70 is a plastic ground stake with ashaft 240. In alternative embodiments, one or more of the ground anchors70 may have the same or a different construction/configuration from thatshown in FIGS. 1–8 or may have the same or a differentconstruction/configuration from the other ground anchors 70. Forexample, but not by way of limitation, the ground anchor 70 may be aground auger. When inserted into or connected to the ground, the groundanchors 70 form anchor points with the ground. Further, in analternative embodiment of the suspension system 20, especially where theground is a hard surface (e.g., wood, cement, etc.), the ground anchors70 may be replaced with permanent anchor points (e.g., in an insideenvironment with a hard floor, in an outside environment with a hardsupport surface).

Utilizing a flexible connection between the lower end 200 of the poleassembly 40 and the ground anchor 70 allows the lower end 200, when notunder load, to move in a 360 degree arc, at a maximum radius equal tothe distance of the high strength strap 50, relative to the groundanchor 70 and allows the pole assembly 40 to pivot freely within apossible 180 degree range at the lower end 200 relative to the ground.When under load and in response to dynamic loads, the pole assembly 40pivots freely at the lower end 200 relative to the ground, adding to theflexibility of the frameless portable suspension system 20.

With reference to FIGS. 1, 10, and 11, the adjustable length strap ortension connector 50 is made of 1 in. nylon webbing rated at 600 lb.breaking strength and connects below a longitudinal center 270 of thepole assembly 40 to a ground anchor 70. An upper end of the adjustablelength strap 50 is connected below the longitudinal center 270 of thepole assembly 40, above a stop 280 (with circular lip), which iscircumferentially and longitudinally fixed to the circumference of anupper part of the lower pole member 130. The stop 280 prevents the strap60 from sliding past the stop 280 on the pole assembly 40. Theadjustable length strap 50 is connected at an opposite lower end to thehead 230 of ground anchor 70. The adjustable length strap 50 includes astrap length adjustment mechanism 290 (e.g., adjustable cam lock ratedat 600 lbs.) for quickly and easily adjusting the length of the strap50.

The length of the strap 50 may be decreased to increase the pullrearwardly on the pole assembly 40 below the longitudinal center 270.This causes the pole assembly 40 to bow or flex upwardly and rearwardlyas shown in FIG. 4, and causes the pole assembly 40 to pull the uppercorner 80, 90 of the net 30 rearwardly. To increase the vertical andhorizontal tension in the net 30 (increase the rebounding effect of thenet 30 and the frameless portable suspension system 20) whilemaintaining the net 30 in a vertical plane perpendicular to the groundshown in FIG. 4, the length of the pole assembly 40 is increased and thelength of the adjustable length strap 50 is decreased. Increasing thelength of the pole assembly 40 causes the pole assembly 40 to push theupper corner 80, 90 of the net 30 forward; however, decreasing thelength of the adjustable length strap 50 causes the pole assembly 40 tobow upwardly and rearwardly as shown in FIG. 4, and causes the poleassembly 40 to pull the upper corner 80, 90 of the net 30 rearwardly sothat the net 30 is maintained in a vertical plane perpendicular to theground. The bent pole assemblies 40 in combination with the adjustablelength straps 50 stretch the net 30 vertically and horizontally. Thebowed pole assemblies 40 (in combination with the adjustable lengthstraps 50) effectively form adjustable spring mechanisms that pullvertically upward and horizontally outward at the upper corners 80, 90,and greatly enhance the rebounding properties of the stretched net 30.In an opposite manner, to decrease the vertical and horizontal tensionin the net 30, the length of the strap 50 may be increased to decreasethe pull rearwardly on the pole assembly 40 below the longitudinalcenter 270 and the length of the pole assembly 40 may be decreased.Because the pole assemblies 40 are able to pivot freely while the net 30is under tension, a user may easily vary the tension in the net 30 inboth vertical and horizontal directions while the net 30 is under loadand maintaining the net 30 in a vertical plane perpendicular to theground.

With reference to FIGS. 1 and 5, the bottom corners 100, 110 are securedto the ground at anchor points with the ground anchors 70. In theembodiment of the ground anchor 70 shown in FIG. 5, the ground anchor 70has a different configuration than the ground anchors 70 that hold thepole assemblies 40 and adjustable length straps 50 to the ground. Theground anchor 70 illustrated in FIG. 5 includes a head 300 with a crook310 that catches the corner 100, 110 of the net 30 for securing thecorner 100, 110 to the ground at anchor points. As shown in FIGS. 1–3and 9, additional ground anchors 70 similar to that shown in FIG. 5 maybe utilized at various positions along the bottom of the net 30 tosecure the bottom of the net 30 to the ground at anchor points.

FIG. 9 illustrates the frameless portable suspension system 20 in anassembled configuration. In this configuration, the net 30 is in avertical plane perpendicular to the ground, the lower ends 200 of thetelescoping pole assemblies 40 extend inwardly and rearwardly relativeto the upper corners 80, 90, and the adjustable length straps 50 extendrearwardly and inwardly from below the longitudinal center 270 of thepole assemblies 40 to the ground anchors 70. The inner anchors 70 aregenerally aligned and a line drawn therethrough is generallyperpendicular to the vertical plane of the net 30.

An exemplary method of assembling the frameless portable suspensionsystem 20 will now be described. To assemble the frameless portablesuspension system 20, the net 30 is first unrolled/unraveled and spreadout in the desired location (i.e., the net 30 is positioned). Next, thebottom corners 100, 110 of the net 30 are secured to the ground withground anchors 70 (See FIG. 5). The back ground anchors 70 are theninstalled behind the net as shown in FIG. 9. The upper ends 160 of thetelescoping pole assemblies 40 are connected to the upper corners 90,100 of the net 30 (See FIG. 6). The lower ends 200 of the telescopingpole assemblies 40 are then connected to the ground anchors 70 via thehigh strength straps 60 (See FIG. 8). Next, the right pole assembly 40(when looking at the front of the net 30 as in FIG. 3) is pre-tensioned(i.e., the right pole assembly 40 is adjusted to a desired initiallength). Then, the left pole assembly 40 is pre-tensioned and theadjustable length strap 50 is pre-tensioned (strap 50 is adjusted todesired initial length). The right pole assembly 40 is then finaltensioned (i.e., the right pole assembly 40 is fine-tuned to the finaldesired length that provides the desired amount of rebound in the net30) and the right adjustable length strap 50 is tightened/shortened to alength that causes the net 30 to be within a vertical planeperpendicular to the ground as shown in FIG. 9. The left pole assembly40 is then final tensioned or fine-tuned to the final desired lengththat provides the desired amount of rebound in the net 30 and the leftadjustable length strap 50 is tightened/shortened to a length thatcauses the net 30 to be within a vertical plane perpendicular to theground as shown in FIG. 9. The bottom of the net 30 between the bottomcorners 100, 110 is then secured to the ground with the intermediateground anchors 70. The frameless portable suspension system 20 is thenready for use.

An exemplary method of using the frameless portable suspension system 20as a sports ball rebounder, and, in particular, a soccer ball rebounder,will now be described. A user faces the soccer net 30 of the framelessportable suspension system 20 in the orientation shown in FIG. 3. Theuser kicks a soccer ball at the net 30. The soccer ball hits the net 30,causing the net 30 to move rearward, especially the area of the net 30where impact occurs. Because the net 30 is in a high state of tension(in both the vertical and horizontal directions) by the pole assemblies40 and adjustable length straps 50, and the pole assemblies 40effectively function as spring mechanisms, a high percentage of theenergy absorbed by the frameless portable suspension system 20 when thesoccer ball hits the frameless portable suspension system 20, isreturned to the soccer ball and the soccer ball is rebounded backtowards the user. It should be noted, not only is the frameless portablesuspension system 20 ideal for use as a soccer rebounder practice device20, but because the net 30 is the same dimension as the opening of aregulation soccer goal, the soccer rebounder practice device 20 alsoideally functions as a portable soccer goal, which can be set up on anyfield.

Because the frameless portable suspension system 20 lacks a perimeterframe and only uses two telescoping pole assembly 40, one net 30, twoadjustable length straps 50, two high strength straps 60, and anchors70, the frameless portable suspension system 20 is very light-weight,very easy to assemble, and inexpensive to manufacture (especially inview of the relatively short pole length of the pole assemblies 40compared to prior art nets/rebounders where perimeter pole frames orother pole-intensive assemblies were used). The frameless portablesuspension system 20 also allows a user to easily vary the tension inthe net 30 in both vertical and horizontal directions while the net 30is under load and keeps the net 30 in a vertical plane perpendicular tothe ground. The frameless portable suspension system 20 absorbs the blowof large forces such as those produced by a high-velocity soccer ball ora player accidentally running into the net 30 while also exhibitingexceptional rebounding properties.

Different-sized nets 30 may be used with the same frameless portablesuspension system 20. For example, but not by way of limitation, a usermay replace the net 30 with a different-size net 30 (e.g., for anothersize goal such as a smaller youth dimension) without having to changeout the remainder of the frameless portable suspension system 20. Also,the surface and contour of the net 30 may be shaped by changing theposition of where the ground anchors 70 for the central portion of thenet 30 secure the central portion of the net 30 to the ground. Forexample, by placing these central ground anchors 70 aft of the lineformed by the corners 100, 110, the shape of the net 30 will becomepartly concave so that rebounds from the sides of the net 30 aredirected towards the center of the playing area in front of the net 30.

Another advantage of the frameless portable suspension system 20 is thelarge amount of vertical and horizontal tension that the pole assemblies40 (in combination with the adjustable length straps 50) are able to puton the net 30. This is a main reason why the frameless portablesuspension system 20 functions so well as a sports ball rebounder and isable to return such a large amount of the energy imparted on theframeless portable suspension system 20 with the sports ball. A seriesof vertical and horizontal tension tests were conducted near the uppercorners 80, 90 of the net 30. At a pole assembly length of 139.75 in.,the vertical tension near the upper corners 80, 90 was 8.5 lbs. to movethis portion of the net 30 down 1 in. At a pole assembly length of142.75 in., the vertical tension near the upper corners 80, 90 was 14.5lbs. to move this portion of the net 30 down 1 in. At a pole assemblylength of 145.75 in., the vertical tension near the upper corners 80, 90was 16.5 lbs. to move this portion of the net 30 down 1 in. At a poleassembly length of 148.75 in., the vertical tension near the uppercorners 80, 90 was 18.0 lbs. to move this portion of the net 30 down 1in. At a pole assembly length of 142.75 in., the horizontal tension nearthe top center of the net 30 was 10.5 lbs. At a pole assembly length of145.75 in., the horizontal tension near the top center of the net 30 was11.5 lbs. At a pole assembly length of 148.75 in., the horizontaltension near the top center of the net 30 was 12.5 lbs.

It will be readily apparent to those skilled in the art that stillfurther changes and modifications in the actual concepts describedherein can readily be made without departing from the spirit and scopeof the invention as defined by the following claims.

1. A frameless portable suspension system, comprising: a tensionaltwo-dimensional material having a frameless perimeter, opposite uppercorners, and a bottom secured to ground, the tensional two-dimensionalmaterial located in a vertical plane perpendicular to the ground; a pairof adjustable spring mechanisms coupled to the upper corners andproviding the upper corners in tension in an upward vertical directionand a outward horizontal direction, the adjustable spring mechanismsdisposed rearward of the tensional two-dimensional material andincluding lower ends adjacent the ground that are freely pivotalrelative to the ground, the lower ends forming vertices of anglesdefined by the adjustable spring mechanisms and the ground, and theangles freely changeable with free pivotal movement of the lower ends ofthe adjustable spring mechanisms; wherein the tension in the tensionaltwo-dimensional material is adjustable with the adjustable springmechanisms while the tensional two-dimensional material is under tensionand the tensional two-dimensional material is positionable in a verticalplane perpendicular to the ground upon adjustment of the tension in thetensional two-dimensional material with the adjustable spring mechanism.2. The frameless portable suspension system of claim 1, wherein theframeless portable suspension system is a sportsball rebounder and thetensional two-dimensional material is a sports net.
 3. The framelessportable suspension system of claim 2, wherein the sportsball rebounderis a soccer ball rebounder and the tensional two-dimensional material isa 8 ft. in height×24 ft. in length sports net.
 4. The frameless portablesuspension system of claim 1, wherein the pair of adjustable springmechanisms include a pair of adjustable length resilient poles coupledto the upper corners of the tensional two-dimensional material andincluding a longitudinal center, and the frameless portable suspensionsystem further includes a pair of tension connectors including endsconnected to the pair of adjustable length resilient poles near the lowlongitudinal center to provide flex in the pair of adjustable lengthresilient poles and opposite ends secured to the ground.
 5. Theframeless portable suspension system of claim 4, wherein the pair ofadjustable length resilient poles are telescoping pole assemblies. 6.The frameless portable suspension system of claim 4, further includinghigh-strength connectors connecting the lower ends of the pair ofadjustable length resilient poles to the ground at anchor points, thelower ends contacting the ground at locations other than the anchorpoints.
 7. The frameless portable suspension system of claim 4, whereinthe pair of tension connectors are adjustable length straps.
 8. Theframeless portable suspension system of claim 1, wherein the tension inthe upward vertical direction is at least 8.5 lbs. and the tension inthe outward horizontal direction is at least 10.5 lbs.
 9. The framelessportable suspension system of claim 1, wherein the frameless portablesuspension system is an advertising sign suspension system and thetensional two-dimensional material is an advertising sign.
 10. Aframeless portable suspension system, comprising: a tensionaltwo-dimensional material having a frameless perimeter, opposite uppercorners, and a bottom secured to ground, the tensional two-dimensionalmaterial located in a vertical plane perpendicular to the ground; a pairof adjustable length resilient poles coupled to the upper corners of thetensional two-dimensional material and including a longitudinal center,the poles disposed rearward of the tensional two-dimensional materialand including lower ends adjacent the ground that are freely pivotalrelative to the ground, the lower ends forming vertices of anglesdefined by the poles and the ground, and the angles freely changeablewith free pivotal movement of the lower ends of the adjustable springmechanisms; a pair of tension connectors including ends connected to thepair of adjustable length resilient poles below the longitudinal centerto provide flex in the pair of adjustable length resilient poles andopposite ends secured to the ground.
 11. A frameless portable suspensionsystem, comprising: a tensional two-dimensional material having aframeless perimeter, opposite upper corners, and a bottom secured toground, the tensional two-dimensional material located in a verticalplane perpendicular to the ground; a pair of adjustable length resilientpoles disposed rearward of the tensional two-dimensional material andincluding upper ends coupled to the upper corner of the tensionaltwo-dimensional material and lower ends adjacent the ground that arefreely pivotal relative to the ground, the lower ends forming verticesof angles defined by the poles and the ground, and the angles freelychangeable with free pivotal movement of the lower ends of theadjustable spring mechanisms, wherein the pair of adjustable lengthresilient poles provide the upper corners in tension in an upwardvertical direction and a outward horizontal direction.
 12. The framelessportable suspension system of claim 11, further including a pair oftension connectors including ends connected to the pair of adjustablelength resilient poles below the longitudinal center to provide flex inthe pair of adjustable length resilient poles and opposite ends securedto the ground.
 13. The frameless portable suspension system of claim 12,wherein the pair of adjustable length resilient poles are telescopingpole assemblies.
 14. The frameless portable suspension system of claim12, wherein the pair of tension connectors are adjustable length straps.15. The frameless portable suspension system of claim 10, wherein thepair of adjustable length resilient poles are telescoping poleassemblies.
 16. The frameless portable suspension system of claim 10,wherein the pair of tension connectors are adjustable length straps.